On July 24, 1993, 6-year-old Amber Duncan of Mason City, Iowa, was murdered along with her 10-year-old sister Kandace, their mother Lori Ann Duncan, and Lori’s boyfriend Greg Nicholson.

Johnson reportedly gained entry to Nicholson’s home posing as a lost saleswoman. She and Honken bound and gagged Nicholson and Lori Duncan, then forced the family into a vehicle at gunpoint and drove them to a remote wooded area outside Mason City. The adults were shot first and the two girls, still in their swimsuits, were then shot execution-style in the back of the head and buried in shallow graves.

The victims’ remains were not found until 2000, when Johnson provided a map to their location in a jailhouse confession. What details about that day or about Amber’s life are missing that might help readers remember her or come forward with information?